Answer:
X=3
Line DG =32 
I don't know exactly it is right or not
 
        
             
        
        
        
Answer:
y = (-5/3)x - 5
Step-by-step explanation:
5x + 3y = =15
 
slope intercept for is: y = mx + b
 
3y = -5x=15
 
divide both sides by 3:
 
y = (-5/3)x - 5
 
        
             
        
        
        
Since this is a percentage, all you have to do is divide 21 from 80 and multiply that by 100
 21/80 = .2625 * 100 is 26.25
The answer closest to this is 25%, so the answer is 25%
Hope this helped! :D
        
                    
             
        
        
        
Step-by-step explanation:
angle 1=180-(90+58)
 =180-148
 =32
angle1=angle2=32
angle3=180-(108+32)
 =180-140
 =40°